How Much Fuel Can a 48V Mild Hybrid Save?
3 Answers
After multiple tests, it was concluded that 48V mild hybrid technology has no significant impact on vehicle emissions but greatly affects fuel consumption, ideally achieving around 15% fuel savings. The principle of 48V mild hybrid involves adding a 48V auxiliary motor between the engine and transmission without altering the engine compartment layout. It serves two main purposes: first, to save fuel and improve engine smoothness during low-torque phases; second, to reduce the vehicle's electrical load. Below is more related information: Advantages of 48V Mild Hybrid: 1. Electrical Load: Many drivers encounter situations where they idle the car while waiting, listening to music or the radio to pass the time. The vehicle's electrical system operates at only 12V, and turning on the air conditioning, audio system, or other electronics further increases the load. Without the engine running, the battery might drain in just a few minutes, making it impossible to start the car. A 48V mild hybrid system, however, comes with a higher-capacity battery, allowing drivers to listen to music with the engine off and use more onboard electronics without worry. The system will start the engine when the battery is nearly depleted to prevent a complete discharge. 2. Fuel Savings and Low-Torque Smoothness: Engines often lack power during low-torque phases, especially small-displacement turbocharged engines, requiring drivers to press the accelerator harder to compensate. This results in higher fuel consumption. The 48V mild hybrid auxiliary motor addresses this issue by intervening during vehicle startup to reduce engine load and smooth out the jerky feeling caused by insufficient low-torque output. During driving, the 48V mild hybrid, like plug-in hybrid models, performs energy recovery to further save fuel. 3. Performance: The Changan CS55 equipped with a 48V mild hybrid system feels noticeably more responsive during startup compared to conventional models. As for fuel savings, the effect is impressive. The advantage in electrical load management is particularly evident, eliminating concerns about battery drain.
Honestly, after driving a car with 48V mild hybrid for two years, my real-world tests show interesting results. For urban commuting, my previous pure gasoline car consumed 9L/100km, now it's down to 7.5-8L, saving about 15%. The start-stop function helps significantly - the engine automatically shuts off at red lights in traffic, saving considerable fuel. The difference is smaller on highways, but overall, driving 10,000km annually at 8 yuan/L fuel price saves over 500 yuan. Driving habits matter too: smooth acceleration maximizes fuel efficiency, reducing total consumption by 1-2L/100km. This system also extends engine life and reduces vibration, proving cost-effective long-term.
From a technical perspective, the 48V mild hybrid system uses an electric motor to assist the engine, recovers braking energy and stores it in the battery, reducing reliance on fuel during start-stop and low-speed phases, thereby saving gasoline. Actual data shows it can save 10% to 15% in fuel consumption, equivalent to a reduction of 1-1.5 liters per 100 kilometers. The impact varies by scenario: fuel savings can reach up to 20% in congested urban areas due to frequent start-stop activation, while highway cruising may only yield a 5% reduction as motor assistance is limited. Having tested various models, under mixed driving conditions with an annual mileage of 15,000 kilometers, it can save over 600 yuan in fuel costs and reduce emissions by 10%, benefiting the environment.
